it seems they havent updated their roadmap on their website.
Last milestone from december 2017. How's substratum doing lately?
They have completed private beta test and beta testers report everything ran smoothly.
public beta test and open source code release is the next stage
demo vid 0f v0.0.2 --->
https://www.youtube.com/watch?v=H6Dpqc6wQFI&feature=youtu.becheck the twitter feeds